Unidentified Signed and Framed Painting

This is another painting inherited by a friend - I am trying to help him identify the artist. It is a lithograph I believe. It measure 24" x 36" and is signed on the lower right hand corner of the piece but I can't make the signature out. The other corner is number 84/78 so I am guessing it is #78 of 84 editions. No other information that I can locate. As with the previous three I listed - I hope someone recognizes the artists' name. Thank you